应用Delaunay图映射与FFD技术的层流翼型气动优化设计

Abstract

Abstract: In this paper, a free-form deformation (FFD) parameterization method is established based on the non-uniform rational B-splines (NURBS) basic function, and a multi-block structure grid deformation technique is established by the Delaunay graph mapping method. By coupling the parameterization method, the grid deformation technology and computational fluid dynamics (CFD) with particle swarm optimization (PSO) arithmetic, an aerodynamic optimization design system is constructed. This system is applied to a laminar airfoil design of high altitude long endurance (HALE) aircraft. The aerodynamic characteristic object function is evaluated by solving Navier-Stokes equations, and the γ-Re_θt transition model coupling with shear stress transport (SST) turbulent model is introduced to numerically simulate boundary layer transition. The aerodynamic characteristics of the optimized airfoil show that the laminar airfoil aerodynamic optimization design system established in this paper has high efficiency and application value for the airfoil design of HALE aircraft.

Key words: aerodynamic configuration optimization design, Delaunay graph mapping, FFD technique, boundary layers transition, numerical simulation, laminar flow airfoil

CLC Number:

V211.3

HUANG Jiangtao, GAO Zhenghong, BAI Junqiang, ZHAO Ke, LI Jing, XU Fang. Laminar Airfoil Aerodynamic Optimization Design Based on Delaunay Graph Mapping and FFD Technique[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2012, 33(10): 1817-1826.

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Laminar Airfoil Aerodynamic Optimization Design Based on Delaunay Graph Mapping and FFD Technique

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